Support structure



FIG. 1 a is an isometric view of a support structure.

FIG. 2 is another isometric view of the support structure of FIG. 1.

FIG. 3 is a front view of the support structure of FIG. 1.

FIG. 4 is a rear elevation view of the support structure of FIG. 1.

FIG. 5 is a right side elevation view of the support structure of FIG. 1.

FIG. 6 is a left side elevation view of the support structure of FIG. 1; and,

FIG. 7 is a top plan view of the support structure of FIG. 1.

The broken lines shown illustrate environmental subject matter and forms no part of the claimed design. 

CLAIM The ornamental design for a support structure, as shown and described. 